there has been great fluctuation in There has been little fluctuation in there has been a surprising lack of fluctuation in (I hope this is an adjectival phrase . ) We can get rid of the article by switching to plural - there have been surprising increases in fluctuation in (if you could switch "fluctuations" to plural) there have been few fluctuations in - (Actually, we're switching from uncountable to countable here. ) Regards, - A.
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